Review study towards corrosion mechanism and its impact on the durability of concrete structures

Ashhad Imam; Shashank Mishra; Yeetendra Kumar Bind; Ashhad Imam; Shashank Mishra; Yeetendra Kumar Bind

doi:10.3934/matersci.2018.2.276

AIMS Materials Science

2018, Volume 5, Issue 2: 276-300. doi: 10.3934/matersci.2018.2.276

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Review

Review study towards corrosion mechanism and its impact on the durability of concrete structures

Department of Civil Engineering, Sam Higginbottom University of Agriculture Technology and Sciences (Formerly AAI-DU), Allahabad - 211007, U.P, India

Received: 31 December 2017 Accepted: 18 March 2018 Published: 23 March 2018

This paper imparts a review study on the causes and factors responsible for corrosion, its initiation and propagation mechanism inside the structures, leading to a better discernment of the problem associated with the durability of the existing structures. This study employs all necessary information related to the corrosion activity, fostering the researchers towards explicating some productive outcome to enhance the durability characteristics as well as the service life of reinforced concrete structures. Different techniques like, Impressed current technique (normally in a range of 1 mA/cm² to 4 mA/cm²) has been adopted by several authors to induce corrosion artificially to better correlate the result with the natural form of corrosion in the structures. This paper particularly emphasizes on residual flexure and shear capacity of reinforced concrete sections undergoing corrosion mechanism, the effect of which leads to a reduction in strength of up to 50%–60%. Several empirical relationships for the prediction of residual load capacity (flexure and shear) of a reinforced-concrete members and relationships for the surface crack width (lying in a range of 0.05 mm to 15 mm) and weight/mass loss (average loss of 15%–30%) were established based on the data obtained by various experimental observations.
- reinforced concrete,
- durability,
- permeability,
- carbonation,
- corrosion density,
- service life prediction,
- residual strength
Citation: Ashhad Imam, Shashank Mishra, Yeetendra Kumar Bind. Review study towards corrosion mechanism and its impact on the durability of concrete structures[J]. AIMS Materials Science, 2018, 5(2): 276-300. doi: 10.3934/matersci.2018.2.276

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Abstract

This paper imparts a review study on the causes and factors responsible for corrosion, its initiation and propagation mechanism inside the structures, leading to a better discernment of the problem associated with the durability of the existing structures. This study employs all necessary information related to the corrosion activity, fostering the researchers towards explicating some productive outcome to enhance the durability characteristics as well as the service life of reinforced concrete structures. Different techniques like, Impressed current technique (normally in a range of 1 mA/cm² to 4 mA/cm²) has been adopted by several authors to induce corrosion artificially to better correlate the result with the natural form of corrosion in the structures. This paper particularly emphasizes on residual flexure and shear capacity of reinforced concrete sections undergoing corrosion mechanism, the effect of which leads to a reduction in strength of up to 50%–60%. Several empirical relationships for the prediction of residual load capacity (flexure and shear) of a reinforced-concrete members and relationships for the surface crack width (lying in a range of 0.05 mm to 15 mm) and weight/mass loss (average loss of 15%–30%) were established based on the data obtained by various experimental observations.

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